NO334133B1 - Microporous heat insulating body and method for making it - Google Patents
Microporous heat insulating body and method for making it Download PDFInfo
- Publication number
- NO334133B1 NO334133B1 NO20013018A NO20013018A NO334133B1 NO 334133 B1 NO334133 B1 NO 334133B1 NO 20013018 A NO20013018 A NO 20013018A NO 20013018 A NO20013018 A NO 20013018A NO 334133 B1 NO334133 B1 NO 334133B1
- Authority
- NO
- Norway
- Prior art keywords
- heat
- weight
- core
- cover
- insulating
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 11
- 239000010445 mica Substances 0.000 claims abstract description 17
- 229910052618 mica group Inorganic materials 0.000 claims abstract description 17
- 239000000654 additive Substances 0.000 claims abstract description 9
- 229910044991 metal oxide Inorganic materials 0.000 claims abstract description 7
- 150000004706 metal oxides Chemical class 0.000 claims abstract description 7
- 239000003779 heat-resistant material Substances 0.000 claims abstract description 6
- UGGQKDBXXFIWJD-UHFFFAOYSA-N calcium;dihydroxy(oxo)silane;hydrate Chemical compound O.[Ca].O[Si](O)=O UGGQKDBXXFIWJD-UHFFFAOYSA-N 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 239000011810 insulating material Substances 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 239000002657 fibrous material Substances 0.000 claims description 5
- 239000011230 binding agent Substances 0.000 claims description 4
- 239000002985 plastic film Substances 0.000 claims description 3
- 238000009413 insulation Methods 0.000 abstract description 2
- 241000045365 Microporus <basidiomycete fungus> Species 0.000 abstract 1
- 239000012774 insulation material Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 description 7
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 239000011148 porous material Substances 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 238000005452 bending Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 229920002689 polyvinyl acetate Polymers 0.000 description 3
- 239000011118 polyvinyl acetate Substances 0.000 description 3
- 239000013078 crystal Substances 0.000 description 2
- 239000012784 inorganic fiber Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000000615 nonconductor Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000013065 commercial product Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000004049 embossing Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 231100000989 no adverse effect Toxicity 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 229920006300 shrink film Polymers 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
- B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by features of form at particular places, e.g. in edge regions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/04—Arrangements using dry fillers, e.g. using slag wool which is added to the object to be insulated by pouring, spreading, spraying or the like
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/04—Silica-rich materials; Silicates
- C04B14/043—Alkaline-earth metal silicates, e.g. wollastonite
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B30/00—Compositions for artificial stone, not containing binders
- C04B30/02—Compositions for artificial stone, not containing binders containing fibrous materials
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/23—Sheet including cover or casing
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/23—Sheet including cover or casing
- Y10T428/232—Encased layer derived from inorganic settable ingredient
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/23—Sheet including cover or casing
- Y10T428/239—Complete cover or casing
Abstract
Description
Foreliggende oppfinnelse angår et mikroporøst varmeisolerende legeme bestående av en kjerne av komprimert varmeisolerende materiale som inneholder fra 30 til 90 vekt% av et findelt metalloksid og ytterligere additiver, hvor én eller begge overflatene derav har et dekke av et varmemotstandsdyktig materiale. The present invention relates to a microporous heat-insulating body consisting of a core of compressed heat-insulating material containing from 30 to 90% by weight of a finely divided metal oxide and further additives, where one or both surfaces thereof have a cover of a heat-resistant material.
Varmeisolerende legemer er blitt beskrevet, f.eks. i EP-A-0-618 399, hvor det imidlertid kreves at minst én overflate av det dannede stykket har kanalporer med porebasearealer på fra 0,01 til 8 mm<2>og penetreringsdybder på fra 5 til 100%, basert på tykkelsen av det dannede stykket, og hvor det dannede stykkes overflate inneholder fra 0,004 til 10 kanalporer pr. 1 cm2. Heat-insulating bodies have been described, e.g. in EP-A-0-618 399, however, requiring at least one surface of the formed piece to have channel pores with pore base areas of from 0.01 to 8 mm<2> and penetration depths of from 5 to 100%, based on the thickness of the formed piece, and where the surface of the formed piece contains from 0.004 to 10 channel pores per 1 cm2.
Nevnte varmeisolerende legemer fremstilles ved tørrkomprimering og på-følgende sintring ved temperaturer på fra 500 til 900°C med kanalporene dannet ved boring, stansing eller fresing og fortrinnsvis ved hjelp av pregestempel. På grunn av disse tiltakene er det mulig å avlede vanndampen som på eksplosiv måte unnslipper under den hurtige oppvarmingen slik at nedbryting av det varmeisolerende legemet kan unngås. Said heat insulating bodies are produced by dry compression and subsequent sintering at temperatures of from 500 to 900°C with the channel pores formed by drilling, punching or milling and preferably by means of an embossing stamp. Due to these measures, it is possible to divert the water vapor that explosively escapes during the rapid heating so that breakdown of the heat-insulating body can be avoided.
Ulempene ved nevnte varmeisolerende legeme er den kompliserte frem-stillingsprosessen og forringelsen av de varmeisolerende egenskapene på grunn av strømming av gasser inne i porene. The disadvantages of said heat-insulating body are the complicated manufacturing process and the deterioration of the heat-insulating properties due to the flow of gases inside the pores.
En annen prosess for fremstilling av et mikroporøst legeme er blitt beskrevet i EP-A-0 623 567, hvor oksider, hydroksider og karbonater av metallene fra den andre hovedgruppen i elementenes periodiske system komprimeres sammen med pyrogent fremstilt Si02og eventuelt AI2O3og et opacifiseringsmiddel og en organisk fiber med hverandre og deretter sintres ved temperaturer som overstiger 700°C. Denne prosessen er ikke bare komplisert, men har i tillegg den ulempen at det å avkjøle dette godt isolerende materialet på nytt tar lang tid. Another process for producing a microporous body has been described in EP-A-0 623 567, where oxides, hydroxides and carbonates of the metals from the second main group in the periodic table of the elements are compressed together with pyrogenically produced SiO 2 and optionally Al 2 O 3 and an opacifying agent and an organic fibers with each other and then sintered at temperatures exceeding 700°C. This process is not only complicated, but also has the disadvantage that cooling this well-insulating material again takes a long time.
Varmeisolerende legemer fremstilt med svært varmemotstandsdyktige adhesiver og en oppslemming, en silikasol og en leire er blitt beskrevet i DE-C-40 20 771. Her beskrives også ytterligere tidligere teknikk mht. fremstilling og sammen-setning av varmeisolerende legemer. Ulempen med alle varmeisolerende legemer som består av organiske komponenter og spesielt organisk fibermateriale er at nevnte organiske komponenter brenner ved svært høye temperaturer og er kjennetegnet ved en uønsket gassutvikling. Heat-insulating bodies made with highly heat-resistant adhesives and a slurry, a silica sol and a clay have been described in DE-C-40 20 771. Here, further prior art is also described with respect to production and assembly of heat-insulating bodies. The disadvantage of all heat-insulating bodies consisting of organic components and especially organic fiber material is that said organic components burn at very high temperatures and are characterized by an unwanted gas evolution.
DE 41 06 727 beskriver varmeisolerende legemer med et plastarkdekke, hvor det skal anvendes spesielle krympbare plastark. I tillegg inneholder disse varmeisolerende legemene fremdeles organisk materiale og taper sin dimensjons-stabilitet dersom de utsettes for kraftig oppvarming. DE 41 06 727 describes heat-insulating bodies with a plastic sheet cover, where special shrinkable plastic sheets are to be used. In addition, these heat-insulating bodies still contain organic material and lose their dimensional stability if they are exposed to strong heating.
DE-C-42 02 569 beskriver støpeformer for å presse varmeisolerende legemer, spesielt for elektriske strålevarmeinnretninger så som kokeplater. DE-C-42 02 569 describes molds for pressing heat-insulating bodies, in particular for electric radiant heating devices such as hotplates.
WO 98/26928 beskriver et sammenpresset varmeisolerende støpt legeme, spesielt et varmeisolerende panel som omfatter ytre lag og en kjerne som er presset sammen WO 98/26928 describes a compressed heat insulating molded body, in particular a heat insulating panel comprising outer layers and a core pressed together
EP-A-686 732 beskriver tørrkomprimerte varmeisolerende plater bestående av forskjellige indre og ytre materialer, idet nevnte materialer har stabiliserende åpninger som helt igjennom består av det ytre materialet. Disse platene kan også utelukkende fremstilles på en måte som er komplisert, og hverken den mekaniske stabiliteten eller de varmeisolerende egenskapene er optimale. EP-A-686 732 describes dry-compressed heat-insulating plates consisting of different inner and outer materials, said materials having stabilizing openings which consist entirely of the outer material. These plates can also only be produced in a way that is complicated, and neither the mechanical stability nor the heat-insulating properties are optimal.
Nevnte varmeisolerende plater har en annen ulempe i det at det er vanske-lig å unngå å skade de ytre lagene i løpet av skjære- og bearbeidingstrinn om det ikke anvendes svært kostbart verktøy så som laserskjærere ettersom nevnte skjærere er i stand til å omdanne de nydannede kuttede kantene til glass. Said heat-insulating plates have another disadvantage in that it is difficult to avoid damaging the outer layers during the cutting and processing steps unless very expensive tools such as laser cutters are used, as said cutters are able to transform the newly formed cut the edges to glass.
En prosess for fremstilling av primære krystaller av xonotlitttype som er sammenfiltret og sammenslynget med hverandre og anvendelse derav er kjent fra DE 36 21 705. De blæreformede partiklene som har vært kjent frem til i dag med lav densitet har allerede vært anvendt for fremstilling av lettvekts varmeisolerende legemer. Selv i komprimert tilstand har imidlertid xonotlittkrystaller ikke de gode termisk isolerende egenskapene til tørrkomprimerte metalloksider. A process for the production of primary crystals of the xonotlite type which are entangled and entangled with each other and the use thereof is known from DE 36 21 705. The vesicle-shaped particles that have been known until now with low density have already been used for the production of lightweight heat insulating bodies. Even in a compressed state, however, xonotlite crystals do not have the good thermal insulating properties of dry-compressed metal oxides.
Et annet forsøk på å løse problemene med fremstilling av varmeisolerende plater for å oppnå optimale egenskaper er blitt beskrevet i EP 0 829 346, hvor vanskelighetene og ulempene med dagens teknikk nok en gang er opplistet. Another attempt to solve the problems with the production of heat-insulating plates to achieve optimal properties has been described in EP 0 829 346, where the difficulties and disadvantages of the current technique are once again listed.
Et viktig problem ved fremstillingen av varmeisolerende legemer ved hjelp av tørrkomprimering av komponentene er at dette materialet tenderer til å fjære og til å ekspandere på nytt etter komprimering, slik at det i det minste må anvendes høye trykk for å oppnå noenlunde brukbare resultater. An important problem in the production of heat-insulating bodies by means of dry compression of the components is that this material tends to spring and to expand again after compression, so that at least high pressures must be applied to achieve reasonably usable results.
Selv om bøyestyrken til nevnte varmeisolerende plater kan forbedres ved å tilsette fibermateriale, så tenderer høyere fibermengder til å forsterke delamine-ringen av og til å svekke kohesjonskraften for den komprimerte blandingen under det kritiske trinnet ved uttak fra formen. Although the flexural strength of said heat-insulating sheets can be improved by adding fiber material, higher amounts of fiber tend to increase delamination and sometimes weaken the cohesive force of the compressed mixture during the critical step of release from the mold.
I alle tilfeller bør de varmeisolerende platene ikke inneholde organiske eller brennbare komponenter som ved oppvarming til høye temperaturer kan resultere i utvikling av gasser som også tildels kan være toksiske. Til slutt må det være mulig å bearbeide de ferdige varmeisolerende legemene lett og uten noen problemer, f.eks. bør det være mulig å sage, skjære eller bore nevnte legemer uten problemer og uten at det danner seg uønsket støv. In all cases, the heat-insulating boards should not contain organic or flammable components which, when heated to high temperatures, can result in the development of gases which can also be partially toxic. Finally, it must be possible to process the finished heat-insulating bodies easily and without any problems, e.g. should it be possible to saw, cut or drill said bodies without problems and without the formation of unwanted dust.
Til slutt kreves det i mange tilfeller at de varmeisolerende legemene er gode elektriske isolatorer. Det finnes imidlertid anvendelsesområder hvor det er ønsket at minst én av overflatene har elektrisk ledningsevne for å kunne avlede elektrostatiske ladninger. Finally, in many cases it is required that the heat-insulating bodies are good electrical insulators. However, there are areas of application where it is desired that at least one of the surfaces has electrical conductivity to be able to divert electrostatic charges.
Alle disse problemene er blitt løst ved hjelp av foreliggende oppfinnelse som tilveiebringer mikroporøse varmeisolerende legemer som angitt i krav 1. De mikroporøse varmeisolerende legemer inneholder en kjerne av et komprimert varmeisolerende materiale som inneholder fra 30 til 90 vekt% av findelt metalloksid og ytterligere additiver. Additivene kan være fra 0 til 30 vekt% av et opacifiseringsmiddel, fra 0 til 10 vekt% av et uorganisk fibermateriale og fra 0 til 15 vekt% av et uorganisk bindemiddel. I tillegg kan legemet inneholde fra 2 til 45 vekt%, fortrinnsvis fra 5 til 15 vekt%, xonotlitt. Nevnte varmeisolerende legemer er emnet for DE 198 59 084.9. All these problems have been solved by means of the present invention which provides microporous heat insulating bodies as stated in claim 1. The microporous heat insulating bodies contain a core of a compressed heat insulating material containing from 30 to 90% by weight of finely divided metal oxide and further additives. The additives can be from 0 to 30% by weight of an opacifying agent, from 0 to 10% by weight of an inorganic fiber material and from 0 to 15% by weight of an inorganic binder. In addition, the body can contain from 2 to 45% by weight, preferably from 5 to 15% by weight, of xonotlite. Said heat-insulating bodies are the subject of DE 198 59 084.9.
Foreliggende oppfinnelse tilveiebringer også en fremgangsmåte for fremstilling av et mikroporøst varmeisolerende legeme som angitt i krav 6. The present invention also provides a method for producing a microporous heat-insulating body as stated in claim 6.
Fortrinnsvis har nevnte mikroporøse varmeisolerende legeme et dekke av et varmemotstandsdyktig materiale på én av eller begge overflater derav. Spesielt foretrukket er tildekninger som er like eller forskjellige og minst én side består av glimmerark, og den andre består av grovpresset xonotlitt, prefabrikerte glimmer-eller grafittark. Ved anvendelse av xonotlitt og/eller glimmer dannes det dekker som er gode elektriske isolatorer. Ved anvendelse av grafitt dannes det et dekke som har en ledningsevne som i det minste muliggjør avledning av elektriske ladninger. For enkelte anvendelser kan det således være fordelaktig at den ene siden av dekket fremstilles av glimmer og det andre dekket av grafitt. Preferably, said microporous heat-insulating body has a cover of a heat-resistant material on one or both surfaces thereof. Particularly preferred are coverings which are the same or different and at least one side consists of mica sheets, and the other consists of coarsely pressed xonotlite, prefabricated mica or graphite sheets. When using xonotlite and/or mica, coatings are formed which are good electrical insulators. When graphite is used, a cover is formed which has a conductivity which at least enables the dissipation of electrical charges. For certain applications, it can thus be advantageous for one side of the tire to be made of mica and the other tire to be made of graphite.
Det har nå blitt slått fast at det å tildekke porøse varmeisolerende legemer med prefabrikerte glimmerark i betydelig grad forbedrer egenskapene til varmeisolerende legemer på to forskjellige måter, det vil si med hensyn til den termiske ledningsevnen samt de mekaniske egenskapene, spesielt bøyestyrken. For det første har dette blitt slått fast ved hjelp av interne tester av de mikroporøse varmeisolerende legemene i samsvar med DE 198 59 084.9.1 tillegg til dette har det imidlertid også blitt slått fast at en tildekking med prefabrikerte glimmerark i bety delig grad også forbedrer andre mikroporøse varmeisolerende legemer. Det foreliggende oppfinnelse angår er således et mikroporøst varmeisolerende legeme bestående av en kjerne av komprimert varmeisolerende materiale som inneholder fra 30 til 90 vekt% findelt metalloksid og ytterligere additiver, hvor én av eller begge overflatene derav har et dekke av et varmemotstandsdyktig materiale, kjennetegnet ved at dekkene er like eller forskjellige og at minst én side består av prefabrikerte glimmerark og dekket er klebet til kjernen; eller kjernen og dekket er varmeforseglet inne i et ark. It has now been established that covering porous heat-insulating bodies with prefabricated mica sheets significantly improves the properties of heat-insulating bodies in two different ways, that is, with regard to the thermal conductivity as well as the mechanical properties, especially the bending strength. Firstly, this has been established by means of internal tests of the microporous heat-insulating bodies in accordance with DE 198 59 084.9.1 in addition to this, however, it has also been established that a covering with prefabricated mica sheets also significantly improves other microporous heat insulating bodies. The present invention thus relates to a microporous heat-insulating body consisting of a core of compressed heat-insulating material containing from 30 to 90% by weight finely divided metal oxide and further additives, where one or both surfaces thereof has a cover of a heat-resistant material, characterized by the tires are the same or different and that at least one side consists of prefabricated mica sheets and the tire is glued to the core; or the core and cover are heat sealed inside a sheet.
Fortrinnsvis består dekket av et prefabrikert glimmerark på begge sider. Preferably, the cover consists of a prefabricated mica sheet on both sides.
Kjernen inneholder på sin side fortrinnsvis fra 0 til 30 vekt% av et opacifiseringsmiddel, fra 0 til 10 vekt% av et fibermateriale, og fra 0 til 15 vekt% av et uorganisk bindemiddel, idet et uorganisk fibermateriale er foretrukket. The core, in turn, preferably contains from 0 to 30% by weight of an opacifying agent, from 0 to 10% by weight of a fiber material, and from 0 to 15% by weight of an inorganic binder, with an inorganic fiber material being preferred.
Fremfor alt blir de forbedrede mekaniske egenskapene tydelige i varmeisolerende legemer med en tydelig fleksibilitet på grunn av tykkelsen derav. Således er varmeisolerende legemer med en tykkelse på fra 3 til 10 mm, fortrinnsvis fra 5 til 7 mm, spesielt foretrukket. Above all, the improved mechanical properties become evident in heat-insulating bodies with a clear flexibility due to their thickness. Thus, heat-insulating bodies with a thickness of from 3 to 10 mm, preferably from 5 to 7 mm, are particularly preferred.
Videre har varmeisolerende legemer hvor dekket er klebet til kjernen vist seg å være spesielt effektive. Som adhesiver er det mulig å anvende både uorga-niske adhesiver så som vannglass og organiske adhesiver så som polyvinylacetat. Ved oppvarming av de ferdige mikroporøse varmeisolerende legemene har de små mengdene av bearbeidet organisk substans praktisk talt ingen ugunstig virk-ning på egenskapene til nevnte materiale. Furthermore, heat-insulating bodies where the cover is glued to the core have proven to be particularly effective. As adhesives, it is possible to use both inorganic adhesives such as water glass and organic adhesives such as polyvinyl acetate. When heating the finished microporous heat-insulating bodies, the small amounts of processed organic substance have practically no adverse effect on the properties of said material.
I prinsippet er det mulig å varmeforsegle kjernen og glimmerarkene sammen inne i en film, spesielt en krympefilm, i stedet for at de klebes. Slike mikropo-røse varmeisolerende legemer har også en forbedret varmeisolering, en forbedret mekanisk stabilitet og en bedre bøyestyrke enn produktene i samsvar med f.eks. EP-A-0 829 346. In principle, it is possible to heat seal the core and mica sheets together inside a film, especially a shrink film, instead of them being glued. Such microporous heat-insulating bodies also have an improved thermal insulation, an improved mechanical stability and a better bending strength than the products in accordance with e.g. EP-A-0 829 346.
Oppfinnelsen skal illustreres mer detaljert i de følgende eksemplene og sammenligningseksemplene. The invention will be illustrated in more detail in the following examples and comparative examples.
Eksempel 1 Example 1
En blanding av 63 vekt% pyrogen kiselsyre, 30 vekt% rutil, 2 vekt% silikat-fibrer (6 mm lengde) og 5 vekt% syntetisk xonotlitt ble tørrblandet i en tvangsblan-der og deretter tørrkomprimert i en metallform med pressetrykk varierende mellom 0,9 og 7,0 MPa. På denne måten ble det oppnådd plater med densiteter mellom 300 og 560 kg/m<3>. Bøyestyrken varierte mellom 0,1 MPa og 0,8 MPa som en funksjon av densiteten. Verdiene er illustrert på fig. 1. A mixture of 63% by weight fumed silicic acid, 30% by weight rutile, 2% by weight silicate fibers (6 mm length) and 5% by weight synthetic xonotlite was dry-mixed in a forced mixer and then dry-compressed in a metal mold with pressing pressure varying between 0, 9 and 7.0 MPa. In this way, plates with densities between 300 and 560 kg/m<3> were obtained. The flexural strength varied between 0.1 MPa and 0.8 MPa as a function of density. The values are illustrated in fig. 1.
Videre ble lambdaverdiene (termisk ledningsevne i W/(m °K)) som en funksjon av temperaturen bestemt ved anvendelse av en isolert varm plate i samsvar med DIN 52 612. Furthermore, the lambda values (thermal conductivity in W/(m °K)) as a function of temperature were determined using an insulated hot plate in accordance with DIN 52 612.
De ovennevnte platene ble belagt med et 0,1 mm tykt glimmerark på begge sider og klebet fast med et kommersielt organisk adhesiv på basis av PVA (polyvinylacetat). Glimmerarkene er et kommersielt produkt fra firmaet Cogebi, Belgia. The above plates were coated with a 0.1 mm thick mica sheet on both sides and glued with a commercial organic adhesive based on PVA (polyvinyl acetate). The mica sheets are a commercial product from the company Cogebi, Belgium.
De således oppnådde platene ble testet for bøyestyrke og termisk ledningsevne. Resultatene er oppsummert i følgende tabeller og illustrert på figu-rer 1 og 2: The plates thus obtained were tested for bending strength and thermal conductivity. The results are summarized in the following tables and illustrated in Figures 1 and 2:
Claims (10)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19859084A DE19859084C1 (en) | 1998-12-19 | 1998-12-19 | Microporous heat insulating body, e.g. an insulating panel, comprises a pressed finely divided metal oxide, opacifier, inorganic fibers and inorganic binder material containing xonotlite |
| DE19950051 | 1999-10-16 | ||
| PCT/EP1999/010001 WO2000037388A1 (en) | 1998-12-19 | 1999-12-16 | Microporous heat-insulating body |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| NO20013018D0 NO20013018D0 (en) | 2001-06-18 |
| NO20013018L NO20013018L (en) | 2001-08-17 |
| NO334133B1 true NO334133B1 (en) | 2013-12-16 |
Family
ID=26050908
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO20013018A NO334133B1 (en) | 1998-12-19 | 2001-06-18 | Microporous heat insulating body and method for making it |
Country Status (16)
| Country | Link |
|---|---|
| US (1) | US6818273B1 (en) |
| EP (1) | EP1140728B1 (en) |
| JP (1) | JP4616481B2 (en) |
| KR (1) | KR100683067B1 (en) |
| AT (1) | ATE260876T1 (en) |
| AU (1) | AU2097800A (en) |
| BR (1) | BR9916377B1 (en) |
| CA (1) | CA2355721C (en) |
| CZ (1) | CZ301526B6 (en) |
| DE (1) | DE59908776D1 (en) |
| DK (1) | DK1140728T3 (en) |
| ES (1) | ES2217873T3 (en) |
| NO (1) | NO334133B1 (en) |
| PL (1) | PL193643B1 (en) |
| PT (1) | PT1140728E (en) |
| WO (1) | WO2000037388A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19859084C1 (en) * | 1998-12-19 | 2000-05-11 | Redco Nv | Microporous heat insulating body, e.g. an insulating panel, comprises a pressed finely divided metal oxide, opacifier, inorganic fibers and inorganic binder material containing xonotlite |
| EP1340729A1 (en) * | 2002-02-28 | 2003-09-03 | E.G.O. ELEKTRO-GERÄTEBAU GmbH | Heat-insulating body |
| EP2921465A1 (en) * | 2014-03-20 | 2015-09-23 | PROMAT GmbH | Use of an insulating body as an air conditioning panel |
Family Cites Families (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2117375A1 (en) * | 1970-04-28 | 1971-12-09 | Agency Of Industrial Science & Technology, Tokio | Method of making lightweight calcium silicate material |
| US4381327A (en) * | 1980-10-06 | 1983-04-26 | Dennison Manufacturing Company | Mica-foil laminations |
| DE3033515A1 (en) * | 1980-09-05 | 1982-04-29 | Wacker-Chemie GmbH, 8000 München | THERMAL INSULATION PLATE |
| US4399191A (en) * | 1981-03-11 | 1983-08-16 | Mitsubishi Denki Kabushiki Kaisha | Thin insulating mica sheet and insulated coil |
| US4647499A (en) * | 1983-12-28 | 1987-03-03 | Kabushiki Kaisha Osaka Packing Seizosho | Shaped body of calcium silicate and process for producing same |
| JPS6283388A (en) * | 1985-10-07 | 1987-04-16 | 日東紡績株式会社 | Inorganic fiber body |
| US4783365A (en) * | 1986-04-09 | 1988-11-08 | Essex Group, Inc. | Mica product |
| DE3621705A1 (en) | 1986-06-28 | 1988-01-14 | Giulini Chemie | AREA AREA FELTED AND NETWORKED XONOTLITE CRYSTALS AND THEIR PRODUCTION |
| DE3816979A1 (en) * | 1988-05-18 | 1989-11-30 | Wacker Chemie Gmbh | THERMAL INSULATION BODIES BASED ON COMPRESSED, MICROPOROUS HEAT INSULATION WITH A COVER BASED ON METALS |
| DE4106727C2 (en) * | 1991-03-02 | 1995-11-16 | Porotherm Daemmstoffe Gmbh | Process for the production of encased microporous molded thermal bodies |
| US5631097A (en) * | 1992-08-11 | 1997-05-20 | E. Khashoggi Industries | Laminate insulation barriers having a cementitious structural matrix and methods for their manufacture |
| DE4310613A1 (en) * | 1993-03-31 | 1994-10-06 | Wacker Chemie Gmbh | Microporous thermal insulation molded body |
| US5399397A (en) * | 1993-04-21 | 1995-03-21 | Martin Marietta Energy Systems, Inc. | Calcium silicate insulation structure |
| JP3584583B2 (en) * | 1995-12-12 | 2004-11-04 | ソニー株式会社 | Stacked non-aqueous electrolyte secondary battery |
| DE19635971C2 (en) * | 1996-09-05 | 2003-08-21 | Porextherm Daemmstoffe Gmbh | Thermal insulation molded body and method for its production |
| DE19652626C1 (en) * | 1996-12-18 | 1998-07-02 | Porextherm Daemmstoffe Gmbh | Molded heat insulating body with casing and process for its production |
| JP3876491B2 (en) * | 1997-02-27 | 2007-01-31 | 三菱電機株式会社 | Vacuum insulation panel, method for manufacturing the same, and refrigerator using the same |
| JPH11185939A (en) * | 1997-12-17 | 1999-07-09 | Matsushita Electric Ind Co Ltd | Heater device and manufacture thereof |
| DE19859084C1 (en) * | 1998-12-19 | 2000-05-11 | Redco Nv | Microporous heat insulating body, e.g. an insulating panel, comprises a pressed finely divided metal oxide, opacifier, inorganic fibers and inorganic binder material containing xonotlite |
-
1999
- 1999-12-16 US US09/857,182 patent/US6818273B1/en not_active Expired - Lifetime
- 1999-12-16 EP EP99965479A patent/EP1140728B1/en not_active Expired - Lifetime
- 1999-12-16 AU AU20978/00A patent/AU2097800A/en not_active Abandoned
- 1999-12-16 BR BRPI9916377-2A patent/BR9916377B1/en not_active IP Right Cessation
- 1999-12-16 AT AT99965479T patent/ATE260876T1/en active
- 1999-12-16 ES ES99965479T patent/ES2217873T3/en not_active Expired - Lifetime
- 1999-12-16 PT PT99965479T patent/PT1140728E/en unknown
- 1999-12-16 KR KR1020017007640A patent/KR100683067B1/en not_active IP Right Cessation
- 1999-12-16 DE DE59908776T patent/DE59908776D1/en not_active Expired - Lifetime
- 1999-12-16 CA CA002355721A patent/CA2355721C/en not_active Expired - Fee Related
- 1999-12-16 WO PCT/EP1999/010001 patent/WO2000037388A1/en active IP Right Grant
- 1999-12-16 PL PL99349436A patent/PL193643B1/en unknown
- 1999-12-16 CZ CZ20012213A patent/CZ301526B6/en not_active IP Right Cessation
- 1999-12-16 JP JP2000589463A patent/JP4616481B2/en not_active Expired - Fee Related
- 1999-12-16 DK DK99965479T patent/DK1140728T3/en active
-
2001
- 2001-06-18 NO NO20013018A patent/NO334133B1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| PT1140728E (en) | 2004-06-30 |
| CA2355721A1 (en) | 2000-06-29 |
| NO20013018L (en) | 2001-08-17 |
| BR9916377A (en) | 2001-09-11 |
| AU2097800A (en) | 2000-07-12 |
| ES2217873T3 (en) | 2004-11-01 |
| WO2000037388A1 (en) | 2000-06-29 |
| EP1140728A1 (en) | 2001-10-10 |
| CZ20012213A3 (en) | 2002-07-17 |
| NO20013018D0 (en) | 2001-06-18 |
| BR9916377B1 (en) | 2008-11-18 |
| EP1140728B1 (en) | 2004-03-03 |
| KR100683067B1 (en) | 2007-02-15 |
| DE59908776D1 (en) | 2004-04-08 |
| KR20010105314A (en) | 2001-11-28 |
| ATE260876T1 (en) | 2004-03-15 |
| PL193643B1 (en) | 2007-03-30 |
| US6818273B1 (en) | 2004-11-16 |
| DK1140728T3 (en) | 2004-07-12 |
| JP2002533285A (en) | 2002-10-08 |
| CZ301526B6 (en) | 2010-04-07 |
| PL349436A1 (en) | 2002-07-29 |
| JP4616481B2 (en) | 2011-01-19 |
| CA2355721C (en) | 2009-09-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| NO331414B1 (en) | Microporost heat insulating body | |
| NO312507B1 (en) | Aerogel-containing composite material, method of manufacture thereof and use of the material | |
| RU2009135805A (en) | METHOD FOR PRODUCING MICROFLUIDE DEVICES | |
| JP2002533286A5 (en) | ||
| KR101575989B1 (en) | Lightweight, Sound absorbing And Thermal Insulating Panel with Expaned Graphite And Manufacturing Method of The Same | |
| US11718731B2 (en) | Process and formulation to join ceramic forms while maintaining structural and physical characteristics across the bond surface | |
| NO334133B1 (en) | Microporous heat insulating body and method for making it | |
| US20170146179A1 (en) | Hybrid high temperature insulation | |
| JP2008214173A (en) | Inorganic lightweight heat insulating plate material and method of manufacturing the same | |
| JP2002533285A5 (en) | ||
| CN114961001A (en) | Foamed ceramic plate | |
| KR20050025534A (en) | The manufacturing method of ceramic body having good adiabatic capacity | |
| KR101539951B1 (en) | Silica aerogels and fiberglass laminated pipe type heat insulating material and Method for producing the same | |
| KR20160095807A (en) | The mixed inorganic system and a method of manufacturing for the high temperature gasket | |
| CN111005464A (en) | Heat-insulating metal material | |
| KR101990464B1 (en) | Inorganic binder for high temperature insulating materials, superhigh temperature insulating materials containing the same and Manufacturing method thereof | |
| CN211690858U (en) | Self-heating graphene indoor fireproof plate | |
| CN109140119A (en) | A kind of asbestos insulation plate | |
| US1286043A (en) | Composite insulating material and process of making the same. | |
| Doyle et al. | Inorganic bonded mica paper for commutator and high-temperature applications | |
| JPS63433Y2 (en) | ||
| CN203160434U (en) | Fiber expanded-perlite insulation board | |
| KR20170104698A (en) | Composite heat insulator and method for producing thereof | |
| BRPI1003927A2 (en) | process for making very thin ceramic tiles | |
| JP2007182332A (en) | Method of manufacturing inorganic foamed heat-insulating board material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MM1K | Lapsed by not paying the annual fees |